PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/11-07:57:40
G07     7.5            66.8                6.1 +/-    0.96       6.6 +/-    0.96  0.110 / 0.160
G08     75.3           52.5                6.2 +/-    1.02       7.6 +/-    1.02  0.220 / 0.230
G09     179.7          55.6                8.9 +/-    0.84      10.6 +/-    0.84  0.040 / 0.040
G11     135.9          24.4                8.5 +/-    2.14      16.9 +/-    2.14  0.030 / 0.030
G23     158.7          23.7                8.0 +/-    0.84      16.1 +/-    0.84  0.060 / 0.040
G27     43.4           21.8                3.9 +/-    2.20       8.2 +/-    2.20  0.050 / 0.040
G28     248.4          35.1                8.7 +/-    1.33      13.8 +/-    1.33  0.060 / 0.120
G30     314.0          45.4                5.4 +/-    0.88       7.3 +/-    0.88  0.070 / 0.120